Method of opening sheet and tin-plate packs



Patented Apr. 24, 1923.

Iwww f WILLIAM NEWBY, ,or YoUNGsroWN, omo.. y

METHOD .orl OPNING snaar A'N'nfTiNLATE PACKS. *i

Application mednay as, 1,9231'. "scriai no. 471,340.

- To all 'whomz't may concern:

Be` itfknown that'I, IVILLIAM NEwBY, a citizen4 of the `United States, andaresident ofl Youngstown, county of `Mahoning, and Stateof Ohio, have Vinvented 'a new and useful Improvementfin "Methods of Opening Sheet and Tin-Plate Packs, of which'thefollowing is a specification, the principlaof the invention being'herein explained/and the best mode in which I have contemplated applying that principle, so as to distinguish it from'other inventions.

'Ihe present invention relates to a method of opening sheet and tiny pla-.te packsv by first crimping the packs and then flatteningout the crimps. The object of'the presentinvention is t0 more thoroughly open the'pack by crimping it in an improved manner and thus separating the ksheets more thoroughly than has heretofore'been done.

The annexed drawing and the following description set forth in detail one approved method of carrying out the invention, such disclosed mode, however, constituting but one of the various ways in which the principle of the invention may be used.

In said annexed drawing Fig. l is a perspective view of the crimping and flattening rolls showing the position ofthe pack passing through the same; Fig. 2 is a diagrammatic section through the rolls to show the action of the crimping flutes as they travel across the pack; Fig. 3 is a diagrammatic view showing the crimps being formed and the resultant wave in the pack by the formation of the crimp. l

In the usual methodsI employed in separating sheet and tin plate packs, the packs are crimped at right angles to the edges or sides of the pack and then are passed through flattening rolls which are either parallel to the crimping rolls or at right angles to them. In the present method the pack is passed through two crimping rolls 2 which are provided with spiral flutes 8 and, thus each corrugation 4 across the pack isformed gradually from one side toward the other instead of being rolled into the pack in the usual or old method. The corrugations or crimps 4 which are thus formed in the pack arel at an acute angle A to the edge or side 5 of the pack rather than ata right angle as in the usual method. The crimped pack is then passed through a pair of flattening rolls 6 which are parallel to the crimping rolls and it will be seen from l, that the flattening rolls cover approximately .four crimps the same 'time and' thus the crimped pack cannot weavev through these flattening rolls and'come' out lin a crimped condition. l

By forming the crimps with rolls having spiral flutes as shown1,the separation of the sheets'is to a greatextent,:accomplishedduring the crimping operation. Where* the crimps or corrugations in thepack extend at rightanglesto theside edges of the pack,

there is merely a corrugatingr `action and practically no separating action 4duringthe crimping process and the separating action that takes place only during the att'ening process. Vith the present method as best illus trated f liagrammatically in Figs. 2 and 3, the formatioirof a corrugation in the' pack starts at one edge or side ofthe pack and gradually works across' the pack 'to thel other-hedge.

forming the corrugationin'this manner,

there is set up ahead of the corrugation proper, a reverse l0 wave in the pack itself which wave is diagrammatically illustrated in Figs. 2 and 3. This wave action across the pack during the corrugating or crimping process tends to separate the sheets from each other as the pack is being crimped and it has been found that the sheets are better separated at the en d of the crimping action than they have heretofore been at the end of the flattening action. The flattening action in the present process completes the breaking apart of the sheets where this has not already been accomplished, and also sub* stantially flattens the packs out again so that the individual sheets are in a satisfactory flattened 'condition when'received from the flattened rolls. l

The use of the rolls with spiral fiutes makes the crimping action a sort of a continuous rolling motion across the pack which forms the corrugations in the pack in a.

gradual and continuous manner, and at the'w same time, tends to .form the reverse waves or crimps 10 just immediately ahead of the flutes and these reverse waves or crimps spread out some distance over the uncrimped pack and tend to break the sheets apart before they are crimped or corrugated.

It will of course, be understood that the crimping and flattening rolls may be used in series, that is, twoor moresets of rolls can beused and where this is done, a second set of crimping rolls is preferably reversed as to direction and angle of the flutes so that the second set of corrugations would runl at the i is, Where the complete corrugations is rolled intjo the pack at one time.

Other modes of applying the principle of my invention maybe employed instead of the one explained, change being made as regards the method herein disclosedpro vided the step or steps stated by any of the following claims or the equivalent of such stated stepror steps be employed.

I therefore particularly point out and l distinctly claim as my invention l. The method of opening sheet and tin plate packs by rolling corrugations into the pack, each corrugation being4 thus rolled gradually from one side toward the other transversely ofthe direction of movement of such pack through the rolls, and then passing the corrugated pack through flattening rolls.

2. The method of opening sheet and tin plate packs by forming corrugations at an acuteangle tothe side of the pack and forming each corrugation gradually and continuously from one side to the other of the pack and then passing such corrugated pack through flattening rolls.

3. The method of opening sheet and tin -plate packs by forming vcorrugations at an acute angle tothe side of the pack and forming each corrugation gradually and continuously from oneside to the other of the pack and then passing they corrugated pack through flattening rolls arranged to span a plurality of such corrugations.

4. The method of opening sheet and tin plate packs by. formingA corrugations at an acute angle yto the side'of'the pack and forming each corrugation graduallyl and continuously, from one side'` to the other ofthe pack and then passing the corrugated pack through iiattening rolls arranged to span a plurality of but not all oflsuch corrugations.

Signed by me this` 12th day of May, 1921..

WILLiAM NEWB Y. 

